Culvert



c. F. J. CHARLISS.

CULVERI. APPLICATXDN FILED MAR-1h I915.

Patented Mar. 23, 1920.

WITNESSE LIBS, acitizen of the NITED STATES Paras cn annns r. J. CHABLISS, or nousron, rniras.

curvnar.

nsaaisi.

To all whom it may concern;"

Be it known that I CHARLES F. J. CHAR- and useful Improvements in Culverts, of which the following is a specification.

. This invention relates to new and useful improvements in culverts, which is also adapted to be used for sewersor other similar underground conveyors.

The object of the invention is to provide a culvert or sewer formed of sections of con rugated concrete, sheet metal or other suitable material, preferably arcuate in cross section, so that the sections will be ne'stable,

which conduces to compactness in shipping the sections of which the culvert is formed. Another feature of the invention resides in a structure whereby the sections may be jointed or united together in forming th culvert or sewer.

' A still further feature of the invention resides in the provision of a structure of the .character described formed of corrugatedconcrete or metallic sections adapted to be constructed into a culvert having two,

. three or more sides.

Finally the object of the invention is to provide a structure of the character described of maximum strength and minimum weight conducing to easy and inexpensive transportation and facilitating the handling and installing thereof.

With the above and other objects in View,

the invention has particular relation to certain novel features of construction, arrange ment-of parts and use, an example of which is given in this specification and illustrated in the accompanying drawings, wherein:

Figure 1, shows a vertical sectional new I of the culvert having three sides.

specification of Letters Batent.

United States, residing at Houston, in the county of Harrls and State of Texas, have invented certain new Tatented Mar. 23, 1920.

Application filed March a, 1915. Serial No. 12,821.. i

Fig. 7, shows a diagrammatic view of a four-sided sewer or culvert constructed in accordance with. this invention, and,

Fig. 8, shows an end view of the structure formed of sections of the character shown in-'Fig. l.'

Referring now more particularly to the drawings wherein like numerals of reference designate similar parts in each of the figures, the numerals 1, l and the numeral 2, refer respectively, to the side slabsand bottom slab of a section of a sewer or culvert,

slightly curved or arcuate in cross section, so as to conduce to great strength in proportion to the weight of the slab and the amount of material therein. As shown, these slabs are formed of concrete, but sheet metal or any other suitable rnaterial may be employed. The adjacent edges of the slabs or plates forming the respective sides of the structure, are joined, preferably, by straight shoulder and tenon 3 and a, 01111- ing .sutures, and. these joints are held position by means of the pressure of the surrounding earth. and strength is added to.

the structure by arranging the respective side slabs so as to break joints, as illustrated a in Fig. 3.

As shown in Figs. s and 8, amodified form of joint is employed, wherein the interlocking parts have lengthwise orifices, as 5, arranged in ali'nement when the slabs are placed in position, and provided to receive loclring rods, as 6, for securing the slabs in position.

It is obvious that anarch eifect,-and the strength given thereby will be obtained in j thisstructure, it as is illustrated more accurately in Figs. 1;2, 6 and 8.

When the slabs are formed of concrete they should-be reinforced with steel rods, as 7. These reinforcements are so located in the slab, as to give the maximum amount of strength, some of the rods passing over the rlbs or corrugations and them ends ter-.

minating in, the respective troughs on the opposite sides of the corrugations over which they pass. These rods reinforce the sides against bulging laterally, as a result of the vertical pressure sustained by the sewer from above. The other rods each span a troughibetweentwc corrugations, be-

ginning at one end of one corrugation and termmati-ng 1n llllG'OPPOSltE'. end of the other corrugation. These rods reinforce the sides said slabs being transversely corrugated and of the culyert against wardly by lateral pressure. ather forms of bein pressed inreinforcing may be employecheithr transiverse reinforcing rods; reinforcing mesh or such other forms as maybe desired; and it is further to be observed that'reinforcing is not indispensable and in many cases the culvert. may be constructed without reinforcement of any character.

' \Vhat Iclaiin is:

11A culvert, formed of a plurality of arched slabs, corrugated in longitudinal section, said slabs having'interlocking edges, the interlocking parts being set back from the corresponding edges of-the slabs and longitudinal lockingrods passing through said interlocking parts andsecuring them together.

2. A culvert, formed of arched slabs, the

' name to this specification in the presence of two subscribing Witnesses.

T. A, LIDDELL. 

